html,
body {
    height: 100%;
    margin: 0;
}

pre {
    margin: 0;
}

.col-container {
    position: relative;
    display: flex;
    flex-direction: column;
    flex-basis: auto;
}

.row-container {
    position: relative;
    display: flex;
    flex-direction: row;
    flex-basis: auto;
}

.div-top {
    position: relative;
    width: 100%;
    flex-shrink: 0;
}

.div-bottom {
    position: relative;
    width: 100%;
    flex-shrink: 0;
}

.div-left {
    position: relative;
    height: 100%;
    flex-shrink: 0;
}

.div-right {
    position: relative;
    height: 100%;
    flex-shrink: 0;
}

.div-middle {
    position: relative;
    width: 100%;
    height: 100%;
    flex-shrink: 1;
    overflow: hidden;
}

.absolute-center-col {
    position: absolute;
    top: 50%;
    transform: translate(0, -50%)
}

.absolute-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%)
}
